#!/bin/bash
#
# render_doIdentityImageGrub.sh -- This function provides
# post-rendering action used to produce GRUB images.
#
# Copyright (C) 2009-2010 Alain Reguera Delgado
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.
#
# ----------------------------------------------------------------------
# $Id: render_doIdentityImageGrub.sh 71 2010-09-18 05:41:11Z al $
# ----------------------------------------------------------------------
function render_doIdentityImageGrub {
local FILE=$1
local ACTION="$2"
local OPTIONS=''
# Define 16 colors images default file name prefix.
local PREFIX='-14c'
# Define options using those passed to actions from pre-rendering
# configuration script. These options are applied to pnmremap when
# doing color reduction, so any option available for pnmremap
# command can be passed to renderSyslinux functionality.
OPTIONS=$(echo "$ACTION" | cut -d: -f2-)
# Re-define 16 colors images default file name prefix using
# options as reference. This is useful to differenciate final
# files produced using Floyd-Steinberg dithering and files which
# do not.
if [[ "$OPTIONS" =~ '-floyd' ]];then
PREFIX="${PREFIX}-floyd"
fi
# Check options passed to action. This is required in order to
# aviod using options used already in this script. For example
# -verbose and -mapfile options.
for OPTION in $OPTIONS;do
# Remove anything after equal sign inside option.
OPTION=$(echo $OPTION | cut -d'=' -f1)
if [[ "$OPTION" =~ "-(mapfile|verbose)" ]];then
cli_printMessage "`eval_gettext "The \\\$OPTION option is already used."`"
cli_printMessage "$(caller)" "AsToKnowMoreLine"
fi
done
# Define Motif's palette location. We do this relatively.
local PALETTES=/home/centos/artwork/trunk/Identity/Themes/Motifs/$(cli_getThemeName)/Colors
# Define the Netpbm color palettes used when reducing colors.
# These palettes should be 14 colors based. For more information
# on this see the GRUB's documentation.
local PALETTE_PPM=$PALETTES/grub.ppm
# Check GRUB's palettes existence: If there is no palette assume
# that this is the first time you are rendering GRUB images. If
# that is the case the script will provide you with the PNG format
# which should be used as base to produce (using GIMP) the .gpl
# palette. The .gpl palette information is used to produced
# (using GIMP) the colormap (.ppm) which is used to automate the
# GRUB's 14 colors image (splash.png) rendering. If there is no
# palette available, do not apply color reduction, show a message,
# and continue.
cli_checkFiles $PALETTE_PPM
# Create Netpbm superformat (PNM). PNM file is created from the
# PNG image rendered previously. PNM is a common point for image
# manipulation using Netpbm tools.
cli_printMessage "$FILE.pnm" "AsSavedAsLine"
pngtopnm -verbose \
< $FILE.png \
2>$FILE.log \
> $FILE.pnm
# Reduce colors as specified in ppm palette of colors.
cli_printMessage "${FILE}${PREFIX}.ppm" "AsSavedAsLine"
pnmremap -verbose -mapfile=$PALETTE_PPM "$OPTIONS" \
< $FILE.pnm \
2>>$FILE.log \
> ${FILE}${PREFIX}.ppm
# Create the 14 colors xpm.gz file.
cli_printMessage "${FILE}${PREFIX}.xpm.gz" "AsSavedAsLine"
ppmtoxpm \
< ${FILE}${PREFIX}.ppm \
2>>$FILE.log \
> $FILE.xpm \
&& gzip --force $FILE.xpm \
&& mv $FILE.xpm.gz ${FILE}${PREFIX}.xpm.gz
}